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Advice on Speedmaster 105003 crown

Banner Roar
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Found this in the bottom of my bits box 😟

Don't expect water tight but wonder if anyone can see any reason why this will not work on a 105003.

Thanks in advance........
IMG_20240512_101441.jpg IMG_20240512_101408.jpg IMG_20240512_101356.jpg
 
Banner Roar
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flqt-9000 flqt-9000
What is the diameter?

As accurately as I can measure the diameter is less than 7mm (~6.5mm) and thickness ~4mm. It has 24 teeth so from Moonwatch Only I think it matches a A1 crown.
 
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